CN204242710U - A multi-stage magnetization fixture for the inner surface of a small magnetic ring - Google Patents

Abstract

The utility model discloses the multistage magnetizing clamp of a kind of small-sized magnet rings inner surface, comprise columniform matrix, matrix is arranged 2n the winding displacement hole along its outer ring uniform intervals arrangement, winding displacement hole is slotted eye, two wires have been arranged side by side in each winding displacement hole, be arranged in different winding displacement holes and the connection of the head end of adjacent two wires, will wherein any one winding displacement hole as the 1st winding displacement hole, in 1st winding displacement hole, the tail end of the 2nd wire is electrode input end along clockwise direction, in 2n winding displacement hole, the tail end of the 2nd wire is negative input along clockwise direction, for accessing magnet charger negative pole, in 2n winding displacement hole, except the tail end of other wires of tail end except the tail end of the 2nd wire in 2n winding displacement hole of the 2nd wire in the 1st winding displacement hole along clockwise direction, and mode that the sense of current of adjacent two winding displacement hole inside conductors accesses contrary identical according to the sense of current of two wires accesses in same winding displacement hole is connected, advantage is long service life, magnetizes effective.

Description

A multi-stage magnetization fixture for the inner surface of a small magnetic ring

technical field

The utility model relates to a magnetizing fixture, in particular to a multi-stage magnetizing fixture for the inner surface of a small magnetic ring.

Background technique

When performing multi-stage magnetization on the inner surface of small magnetic rings (magnetic rings with an inner hole diameter of 10 mm to 20 mm), the magnetizing fixture is usually used to install the magnetic ring and then connected to the magnetizing machine for magnetization. Existing magnetizing fixtures generally include a cylindrical iron base body. A circle of evenly spaced wiring holes is provided on the outer ring of the iron base. Each wiring hole is provided with a wire, and two adjacent wires are connected alternately from end to end. The cable hole is a round hole, and the outer diameter of the wire matches the aperture of the cable hole.

The existing magnetizing fixture has the following problems: the larger the diameter of the wire, the greater the magnetizing current it can withstand, and the diameter of the cable hole determines that the diameter of the wire cannot be increased too much. At present, the current through the wire is mainly increased by increasing the magnetization voltage, but the current that a single wire in the cable hole can withstand is only about 15KA. When the current is 15KA, the magnetization fixture produces The magnetic field is only about 1.7T. The resulting magnetic field diagram is shown in Figure 1. The waveform of the inner wall of the product after magnetization is shown in Figure 2. The maximum surface magnetism of the product after magnetization under this magnetic field is 137mT, and the magnetization performance is often difficult to meet the requirements. , the waveform deviates more from the sine wave, and the magnetization effect is poor. In addition, the wire is often in a high-current working state, and the loss is large, which will shorten the life of the magnetization fixture.

Contents of the invention

The technical problem to be solved by the utility model is to provide a multi-stage magnetization fixture for the inner surface of a small magnetic ring with long service life and good magnetization effect.

The technical scheme adopted by the utility model to solve the above-mentioned technical problems is: a multi-stage magnetization fixture for the inner surface of a small magnetic ring, including a cylindrical base body, and 2n rows arranged at regular intervals along the outer ring of the base body are arranged on the base body. The wire hole, the wire hole is an oval hole, two wires are arranged side by side in each wire hole, and the head end and tail end of each wire pass through the wire hole to the wire hole respectively. Outside the upper and lower ends of the substrate, they are located in different cable holes and the first ends of two adjacent wires are connected. Use any one of the cable holes as the first cable hole, and the first cable in the clockwise direction The tail end of the second wire in the hole is the positive input end, which is used to connect the positive pole of the magnetizer, and the tail end of the second wire in the 2nth cable hole clockwise is the negative input end, which is used to connect The negative pole of the magnetic machine, the tail of other wires except the tail end of the second wire in the first wire hole in the clockwise direction and the tail end of the second wire in the 2n wire hole in the 2n wire holes The terminals are connected in such a way that the current direction of the two wires in the same cable hole is the same and the current direction of the wires in two adjacent cable holes is opposite, where n≥1.

The number of wiring holes provided on the substrate 1 is 8. Starting from the first wiring hole, the wires in the wiring holes are numbered in a clockwise direction, and they are respectively the first wire , the second wire, the third wire, and so on, until the 16th wire, the tail end of the second wire is the positive input end, and the tail end of the 16th wire is the negative input end , the head end of the second wire is connected to the head end of the third wire, the head end of the fourth wire is connected to the head end of the fifth wire, and the The head end of the 6th wire is connected with the head end of the 7th wire, the head end of the 8th wire is connected with the head end of the 9th wire, and the 10th wire is connected with the head end of the 9th wire. The first end of the first wire is connected to the first end of the 11th wire, the first end of the 12th wire is connected to the first end of the 13th wire, and the first end of the 14th wire is connected to the first end of the 14th wire. The first end of the 15th wire is connected, the head end of the 16th wire is connected to the first end of the first wire; the tail end of the third wire is connected to the first The tail ends of the 5 wires are connected, the tail end of the 4th wire is connected to the tail end of the 6th wire, the tail end of the 7th wire is connected to the 9th wire The tail end is connected, the tail end of the 8th wire is connected to the tail end of the 10th wire, the tail end of the 11th wire is connected to the tail end of the 13th wire, The tail end of the 12th wire is connected to the tail end of the 14th wire, and the tail end of the 15th wire is connected to the tail end of the first wire.

The material of the base body is iron-cobalt alloy, the outer cover of the base body is provided with a permalloy sleeve, and a magnetic ring installation cavity is arranged between the permalloy sleeve and the base body, and the permalloy The wall thickness of the sleeve is 0.3mm-0.8mm; the direction of the magnetic force line is changed through the permalloy sleeve, so that the waveform of the magnetic ring after magnetization is closer to a sine wave, and the magnetization accuracy is improved.

The lower part of the base body and the tail end of the wire are covered with a nylon positioning sleeve, the nylon positioning sleeve is filled with resin glue, and the end of each wire is fixed in the resin glue. The positive input end and the negative input end of the multi-stage magnetizing fixture protrude out of the nylon positioning sleeve; the position of the wire is fixed by the nylon positioning sleeve and the resin glue to prevent the occurrence of a short circuit after the wire is offset.

Compared with the prior art, the shape of each cable hole in the base structure is changed from the original circle to the current oval shape, which increases the area of the cable hole, so that the wire can only be arranged in one strand from the original one. It becomes now possible to arrange two strands of wires and increase the number of wire turns, so that the magnetic field strength can be enhanced without increasing the magnetizing voltage, the service life is long, and the magnetizing effect is good.

Description of drawings

Fig. 1 is the magnetic field diagram produced at the junction between the substrate and the magnetic ring when the current of the existing magnetizing fixture is 15KA;

Fig. 2 is the waveform diagram of the inner wall after the product is magnetized using the existing magnetizing fixture;

Fig. 3 is the perspective view of the utility model magnetizing fixture;

Fig. 4 is the exploded view of the magnetizing fixture of the present utility model;

Fig. 5 is the current trend diagram of the magnetizing fixture of the present invention;

Fig. 6 is a magnetic field diagram generated at the joint between the base body and the magnetic ring when the current is 10KA for the magnetizing fixture of the present invention;

Fig. 7 is a waveform diagram of the inner wall of the product after being magnetized by the magnetizing fixture of the utility model.

Detailed ways

The utility model is described in further detail below in conjunction with the accompanying drawings.

Embodiment: As shown in Figure 3 and Figure 4, a multi-stage magnetization fixture for the inner surface of a small magnetic ring includes a cylindrical base 1, and 2n wiring holes 2 arranged at regular intervals along its outer ring are arranged on the base 1 , the cable hole 2 is an oval hole, and each cable hole 2 is provided with two wires side by side, and the head end and tail end of each wire pass through the cable hole 2 to the upper end 3 and the lower end 4 of the substrate 1 respectively. In addition, the first ends of two adjacent wires located in different cable holes are connected, and any one of the cable holes is used as the first cable hole, and the second cable hole in the first cable hole in the clockwise direction The tail end of the wire is the positive input end, which is used to connect the positive pole of the magnetizer, and the tail end of the second wire in the 2nth cable hole in the clockwise direction is the negative input end, which is used to connect to the negative pole of the magnetizer, 2n Except for the tail end of the second wire in the first wire hole and the tail end of the second wire in the 2nth wire hole in the clockwise direction, the tail ends of other wires in the first wire hole follow the same wire arrangement The current direction of the two wires in the holes is the same and the current direction of the wires in the two adjacent rows of holes is opposite, where n≥1.

In this embodiment, the number of wiring holes 2 provided on the substrate 1 is 8. Starting from the first wiring hole, the wires in the wiring holes are numbered in a clockwise direction, and they are respectively the first wire L1, the second wire L2, the third wire L3, and so on until the 16th wire L16.

The tail end of the second wire L2 is the positive input end, the tail end of the 16th wire L16 is the negative input end, the head end of the second wire L2 is connected to the head end of the third wire L3, and the fourth wire L4 The first end of the first wire L5 is connected to the first end of the fifth wire L5, the first end of the sixth wire L6 is connected to the first end of the seventh wire L7, the first end of the eighth wire L8 is connected to the first end of the ninth wire L9 Connection, the first end of the 10th wire L10 is connected with the head end of the 11th wire L11, the head end of the 12th wire L12 is connected with the head end of the 13th wire L13, the head end of the 14th wire L14 is connected with the first end of the 13th wire L13 The first ends of the 15 wires L15 are connected, the head end of the 16th wire L16 is connected to the head end of the first wire L1; the tail end of the third wire L3 is connected to the tail end of the fifth wire L5, and the fourth wire The tail end of the wire L4 is connected to the tail end of the 6th wire L6, the tail end of the 7th wire L7 is connected to the tail end of the 9th wire L9, the tail end of the 8th wire L8 is connected to the 10th wire L10 The tail ends are connected, the tail end of the 11th wire L11 is connected to the tail end of the 13th wire L13, the tail end of the 12th wire L12 is connected to the tail end of the 14th wire L14, and the tail end of the 15th wire L15 is connected Connect to the end of the first wire L1.

The magnetizing jig of this embodiment is an eight-stage magnetizing jig. The current direction of the wires in the same wiring hole is the same, and the current direction of the wires in two adjacent wiring holes is opposite. The current flow diagram is shown in FIG. 5 .

In this embodiment, the material of the substrate 1 is an iron-cobalt alloy, and the substrate 1 is provided with a permalloy 5, and a magnetic ring installation cavity is arranged between the permalloy cover 5 and the substrate 1, and the wall thickness of the permalloy cover 5 is 0.3mm～0.8mm.

In this embodiment, the lower part of the base body 1 and the tail end of the wire are covered with a nylon positioning sleeve 6, and the nylon positioning sleeve 6 is filled with resin glue, and the end of each wire is fixed in the resin glue. The positive input end and the negative input end extend out of the nylon positioning sleeve 6 .

For the magnetizing fixture of this embodiment, when the magnetizing current is 10KA, the magnetic field diagram generated at the joint between the base body 1 and the magnetic ring 7 is shown in Figure 6, and the inner wall waveform after the product is magnetized using the magnetizing fixture of this embodiment The figure is shown in Figure 7. Analysis of Figure 6 shows that the generated magnetic field is about 2.5T, which is stronger than the magnetic field generated by the existing magnetizing fixture at 15KA. Analysis of Fig. 7 shows that the maximum surface magnetism of the product magnetized by the magnetizing jig of this embodiment is 151 mT, which is higher than that of the product magnetized by the existing magnetizing jig, and its waveform is close to a sine wave, and the magnetization effect is good.

Claims (4)

1. the multistage magnetizing clamp of small-sized magnet rings inner surface, comprise columniform matrix, described matrix is arranged 2n the winding displacement hole along its outer ring uniform intervals arrangement, it is characterized in that described winding displacement hole is slotted eye, two wires have been arranged side by side in each described winding displacement hole, the head end of every root wire and the tail end top and bottom respectively through described matrix in winding displacement hole, be arranged in different winding displacement holes and the connection of the head end of adjacent two wires, will wherein any one winding displacement hole as the 1st winding displacement hole, in 1st winding displacement hole, the tail end of the 2nd wire is electrode input end along clockwise direction, for connecting magnet charger positive pole, in 2n winding displacement hole, the tail end of the 2nd wire is negative input along clockwise direction, for accessing magnet charger negative pole, in 2n winding displacement hole, except the tail end of other wires of tail end except the tail end of the 2nd wire in 2n winding displacement hole of the 2nd wire in the 1st winding displacement hole along clockwise direction, and mode that the sense of current of adjacent two winding displacement hole inside conductors accesses contrary identical according to the sense of current of two wires accesses in same winding displacement hole is connected, wherein n >=1.

2. the multistage magnetizing clamp of a kind of small-sized magnet rings inner surface according to claim 1, the quantity that it is characterized in that described matrix is arranged winding displacement hole is 8, from the described the 1st winding displacement hole, wire in winding displacement hole is numbered along clockwise direction successively, be respectively the 1st wire, 2nd wire, 3rd wire, by that analogy, until the 16th wire, the tail end of the 2nd described wire is electrode input end, the tail end of the 16th described wire is negative input, the head end of the 2nd described wire is connected with the head end of the described the 3rd wire, the head end of the 4th described wire is connected with the head end of the described the 5th wire, the head end of the 6th described wire is connected with the head end of the described the 7th wire, the head end of the 8th described wire is connected with the head end of the described the 9th wire, the head end of the 10th described wire is connected with the head end of the described the 11st wire, the head end of the 12nd described wire is connected with the head end of the described the 13rd wire, the head end of the 14th described wire is connected with the head end of the described the 15th wire, the head end of the 16th described wire is connected with the head end of the described the 1st wire, the tail end of the 3rd described wire is connected with the tail end of the described the 5th wire, the tail end of the 4th described wire is connected with the tail end of the described the 6th wire, the tail end of the 7th described wire is connected with the tail end of the described the 9th wire, the tail end of the 8th described wire is connected with the tail end of the described the 10th wire, the tail end of the 11st described wire is connected with the tail end of the described the 13rd wire, the tail end of the 12nd described wire is connected with the tail end of the described the 14th wire, the tail end of the 15th described wire is connected with the tail end of the 1st wire.

3. the multistage magnetizing clamp of a kind of small-sized magnet rings inner surface according to claim 1, it is characterized in that the material of described matrix is ferrocobalt, permalloy cover is arranged with outside described matrix, be provided with magnet ring installation cavity between described permalloy cover and described matrix, the wall thickness of described permalloy cover is 0.3mm ~ 0.8mm.

4. the multistage magnetizing clamp of a kind of small-sized magnet rings inner surface according to claim 1, it is characterized in that the bottom of described matrix and the tail end of described wire are arranged with nylon positioning sleeve, resin glue is filled with in described nylon positioning sleeve, the end of every root wire is fixed in described resin glue, and the electrode input end of described multistage magnetizing clamp and negative input stretch out outside described nylon positioning sleeve.